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Health Hazard Evaluations (HHEs)

Each month we will update this page to highlight newly released final reports and information on new and emerging hazards we are evaluating. Check back often to see what we are up to!

What's New

  • Noise Exposure in Public Works Departments of a Small City
    HHE Program investigators measured noise exposures above occupational noise exposure limits in the electric distribution, operations, and parks and recreation departments. Although the city provided hearing protection to employees for voluntary use, some employees did not wear it when using noisy equipment or machinery. We recommend starting a hearing conservation program that includes audiometric testing and providing hearing protection and training. To read the full report go to
  • Evaluation of Cadmium Exposures at an Aircraft Equipment Depot
    HHE Program investigators found employees removing corroded cadmium-plated parts had exposures to airborne cadmium that exceeded occupational exposure limits, despite the less than 2-hour task duration. We also found cadmium on work surfaces outside the production area. We recommended using a vacuum equipped with a high efficiency particulate air filter and wet wiping to clean work surfaces and tools. To read the full report go to
  • New HHE Video Series Shows What Happens on a Site Visit
    Ever wonder what happens when the Health Hazard Evaluation team visits a workplace? Watch 3 new HHE videos to get a glimpse into our activities. Each video shows a different type of testing or sampling conducted in a workplace and reactions from the employer and employees.
  • 2015 Health Hazard Evaluation Program Annual Report
    The NIOSH Health Hazard Evaluation (HHE) Program is pleased to share its 2015 annual report. Our report includes summaries of projects that were interesting and other highlights of our year. We hope the report stimulates conversations about who the HHE Program is and how we make a difference for the health and safety of employees throughout the United States. A link to the annual report is available here: